Park, Jinsoo Shin, Dong Ho Shin, Youhwan Karng, Sarng Woo 2024-01-19T20:01:15Z 2024-01-19T20:01:15Z 2021-09-02 2019-06 0947-7411 https://pubs.kist.re.kr/handle/201004/119918 Latent heat thermal energy storage (LHTES) affords superior thermal energy capacity and compactness but has limited applications due to the low thermal conductivity of phase change materials (PCMs). Several researches have focused on the improvement of heat transfer and reducing the total melting time of PCMs in LHTES system. Few researches, however, have used flexible PCM containers for this purpose. This study used a flexible elliptical container as a PCM container for improving LHTES heat transfer performance. The effects of the axis ratio (AR) and temperature difference on the thermal charging performance were numerically studied within a single container. Smaller AR values improved the heat transfer performance by promoting heat conduction and natural convection inside the containers. The enhancement rate was increased by 1.1-2.7 times for an AR range of 0.05-0.20 compared to a classic circular container (AR=1). In addition, the elliptical container showed superior in terms of energy density reduction. Therefore, the elliptical container with optimum AR range (0.05-0.20) can be considered a suitable configuration for effective heat transfer enhancement of PCM containers. English SPRINGER PHASE-CHANGE MATERIAL SYSTEM ENHANCEMENT OPTIMIZATION PERFORMANCE TRANSPORT PIPE Analysis of heat transfer in latent heat thermal energy storage using a flexible PCM container Article 10.1007/s00231-018-02534-5 1 HEAT AND MASS TRANSFER, v.55, no.6, pp.1571 - 1581 HEAT AND MASS TRANSFER 55 6 1571 1581 scie scopus 000469823000003 2-s2.0-85058441569 Thermodynamics Mechanics Thermodynamics Mechanics Article PHASE-CHANGE MATERIAL SYSTEM ENHANCEMENT OPTIMIZATION PERFORMANCE TRANSPORT PIPE Latent heat thermal storage Phase change material Heat transfer Melt fraction Flexible pouch